Carbureter.



O. MEISSNER.

CARBURETER.

APPLICATION FILED 0011s, 1912.

1,1 03,802. Patented July 14, 1914,

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OTTO MEISSNER, OF COSWIG, GERMANY.

CARBURETER.

Specification of Letters Patent.

Application filed October 18, 1912.

Patented July 14, 1914. Serial No. 726,566.

To all whom it may concern Be it known that I, Orro MEISSNER, a subject of the Emperor of Germany, and a resident of Coswig Saxony, Germany, have invented a certain Improved Carbureter, of which the following is a specification.

The present invention relates to a floatfeed carbureter and consists in the various details of construction and combination of parts as hereinafter set forth and claimed, the main object of the invention being to produce a carbureter of simple construction which,'by a convenient adjustment of a few interconnected elements, can be instantaneously adapted for more or less volatile liquid fuels.

In the accompanying drawings the invention is illustrated by way of example, Figure 1 representing a vertical section of the apparatus, Fig. 2, a plan of the same partly in section, Fig. 3, a sectional view of the atomizer, and Fig. 4, an elevation of the atomizer at right angles to Fig. 3.

The device consists of a casing in which are formed, side by side,- a float chamber 24 and a carbureting chamber 1. The carbureting chamber 1 has at the bottom an inlet 2 and at the top an outlet 3. A valve cone 5 is provided for regulating and interrupting the discharge of explosive mixture and a cone 4 for regulating the air supply. Both valve cones are connected to a common hollow stem 6 so as to be adjusted simultaneously and uniformly. A coil-spring 7 abutting against the lower part of the casing and against the cone 4, tends to hold theoutlet 3 closed.

Within the stem 6 a tube 8 is arranged which carries at its upper end a small cone 9 having its seat in the upper part of the cone 5.v Below the cone 9 an aperture 10 is made in the tube 8 which is otherwise closed by the cone. The lower'end of the tube 8 projects beyond the end of the stem 6 and is provided with a lateral aperture 11. A nut on the projecting end of the tube 8 is engaged by a lever 12 by means of which the valves can be opened, in opposition to the spring 7 and their position regulated.

The channel which leads to the air inlet is divided by a longitudinal partition into two parts 13 and 14 one of which supplies cold .and the other hot air. A damper45 is fitted transversely in the channel so as to be capable of shutting off either the hot or the cold air stream, or, when in anintermediate position, of admitting both in suitable proportions. The'position of the damper is controlled, through the medium of a system of levers 44, by the flexible wall 42 of a recep tacle 48 containing, in known manner, a liquid having a high coeflicient of expansion. This receptacle is fitted in the wall of the chamber 1 so as to assume the temperature of the latter. If such temperature should increase, the consequent expansion of the receptacle will cause the damper 45 to be adjusted so as to admit more cold and less hot air; If a reduction in the temperature takes place the reverse will be the effect. In this manner the temperature of the chamber 1 will be automatically regulated.

An inclined socket 48, at the lower part-of the carbureting chamber 1, communicates through a duct 16 with the float chamber 24 below the surface of the liquid. A vaporizing tube 15 bears with its lower end against the bottom of the socket 48, its upper part being supported, at the opposite side, in the upper part of the chamber wall. The tube bears against the chamber wall by means of a shoulder and can be withdrawn from the outside. It is normally fastened in position by means of a screw 17 passed through an extension of the shoulder. The internal diameter of the socket 48 is larger than the external diameter of the tube 15 so that a ringshaped space, opening into the carbureting chamber 1, is left between the elements. On a level with the orifice of the socket 48, the tube 15 is provided withslots 22. Opposite these slots an atomizer, in the form of a longitudinally grooved plug 20, is arranged within the tube. The grooves of the plug are widened downward so as to admit more or less liquid according to their position rel-' I ative to the apertures 22. For the adjustment of the plug 20, the latter is connected to a rod 19 which is held by a screw-thread in a shoulder in the upper end of the tube 15 and which projects through the latter so as to allow of being turned from the outside. A lock-nut 18 is fitted on the screw-threaded part of the rod for securing the latter and the plug in an adjusted position.

A float 26 is arranged in the chamber 24 in the usual manner. This float carries a valve cone 27 the seat 28 of which is adjustably held in a socket 30 connected to the top cover 29 of the chamber. The socket 30 is encircled by a sleeve 32 havin spirally disposed slots 38. 'S crews 37 seobliquely or cured to the valve seat- 28,

the slots 38 and through vert cal slots ment is that, When the sleeve32 istlirned, ber 24. the screWs37 W111 be guided by the slots 38 sure in and 31 and adjusted vertically together with valve seat 28. The sleeve 321s turnedby means of a knob 35 connected to an arm 33 on said sleeve. The arm 33 is resilient and carries a stud 36 which secures the sleeve in adjusted position by engagement with' a series of recesses made in the cover 29. A

pointer 34 is also provided on the arm so as to indicate on a scale theposition of the valve seat. The sleeve 32 is retained on the socket 30 by means of a nut 39.

A slidable wedge 41 is interposed between the receptacle 43 and the lever 44. This wedge is connected by a flexible element 40 to the sleeve 32 so that an adjustment of the latter causes a simultaneous adjustment of the wedge and consequently of the damper 45.

A gage tube 47 composed ,wholly or only partly. of glass and fitted with a cock 46,

communicates with the lower part of-the chamber 24.

The chambers 24 and 1 communicate with one another, above the liquid surface,

through an aperture or duct '23, and the chamber-24 communicates with atmosphere.

through an aperture 25 made in'the cover 29.

The modus opera'mli is as follows: The valve seat 28, through which the liquid fuel is fed into the chamber 24, is first adjusted by means of the arm 33 in accordance with the particular fuel to be used, it being raised :for heavy and lowered for light fuel.

Through the medium .of the elements 40,

.produced in the chamber 1. and communiit cated through the duct 23 to the chamber- 24. The degree of such under-pressure can be ascertained from the tube 47 the liquid column of which is correspondingly reduced, the tube being open at the top. The suction of the motor .also causes the liquid to be drawn into the carbureting chamber 1 through the duct'16, the tube 15,the grooves" '21 and the slots 22. The plug '20, which is also adjusted, by means of the rod 9, to suit, the nature of the particular fuel used, atom .izes the liquid, which is mixed in due Iproportions in the chamber 1 with the air coming from the inlet 2, the valves 5 and 2 being adjusted by means of the lever 12 'so as-to-supply more on-less liquid to the motor according to requirements.

If the speed of the motor should increase owing to excessive feedof mixture, the conare passed through sequent reduction of the pressure inv the car- 31in the socket 30. ,The effect of this arrangeburetmg chamber 1 W111 agam be commum' cated through the aperture 23 to the chamef the'metor Will .t

stored to the normal,

as be automatically re- When the valve 5 is closed for stopping OWing t0 the reduction of the presthe chamber 24 less liquid will be fed to the vaperizin chamber, and the speed ously noticed, by the expansible receptacle 43 through the medium of the levers 44 and the damper 45.

The space around the tube 15 in the socket 48 serves to receive the fuel discharged through'the apertures 22 after the motor is stopped. At the starting of the motor the liquid thus collected evaporates and facilitates the starting.

Owing to the simple construction of the carbureter it is easily adjusted and conveniently cleaned. The tube 15 can be easily removed 'for cleaning and for controlling the adjustment ofthe plug 20.

I claim:

1. A carbureter comprising a float chamber, a carbureting chamber communicating with saidfloat chamber below and above the liquid surface, an inclined slotted tube arranged in said carburetingchamber to receive theliquid from the float chamber, a grooved plug arranged in the slotted part of said tube so as to atomize the liquid, means for introducing hot and cold air into the carbureting chamber, means for adjusting the proportions of hot and cold air automatically, a float in the float chamber, a

valve cone carried by the same, an adjust-- able valve seat for said cone, means for adjustlng' the position of said valve seat according to the nature of the fuel used, and

connections between the adjusting device for the valve seat and the regulating device for the air supply causing the proportions of hot andcold air to be varied when the seat is adjusted.

2. In a float-feed carbureter, av carbureting chamber, means for feeding liquid into said chamber, means for atomizing said liquid,.an air inlet at the bottom of the chamber, an outlet for the explosivemixture at the top of the chamber, a valve cone for regulating and closing said outlet, a valve cone for.regulating said inlet,

a hollow vertical stem holding said cones at a constant distance from one another, means for operating said stem so as to adjust the cones, a tube arranged in said stem and having its lower end in comvalve cone connected to the upper end of the tube and seated in the outlet cone so as to be raised by the suction of the motor when said latter coneis moved into closing position, the tube having air vents adapted to admit atmospheric air to the motor when its cone is thus raised, substantially as and for the purpose set forth.

3. In a float-feed carbureter, a vaporizing and mixing chamber, a tube arranged in an inclined position in said chamber so as to receive the liquid from the float chamber, a plug having longitudinal downwar dly widening grooves arranged opposite slots within said tube so as to atomize the liquid and discharge the vapor through its grooves and the slots of the tube, the upper end of the tube being closed and secured to the chamber wall so as to allow the tube to be removed from the'outside, and a rod in said tube holdingthe plug and fitted by means of a screw-thread in the closed end of the tube so as to allow of being turned from the outside for adjusting the position of said plug relative to the slots in the tube, substantially as and for the'purpose set forth.

4:. In a float-feed carbureter', the combination with a carbureting chamber connected by means of a duct with the lower part of the float-chamber and having a socket projecting obliquely from said duct into said carburetin chamber, of a tube arranged in an incline position in said chamber and having its lower end disposed in said socket so as to receive the liquid from the floatchamber, the socket being wider than the tube so that an annular space is formed between them, the tube having slots disposed opposite the orifice of the socket, a plug, having longitudinal downwardly widening grooves, arranged within the tube opposite said slots so as to atomize the liquid and dischargethe vapor through its grooves and through the slots in the tube, the upper end of the tube being closed and secured to the chamber wall so as to allow the tube to be removed from the outside, and a rod in said tube holding the plug and fitted by means of a screw-thread in the closed end of the tube so as to allow of being turned from the outside for adjusting the position of said plug relative to the slots inthe tube, substantially as and for the purpose set forth. 5. In a float-feed carbureter, a carbureting chamber, a channel admitting air to "perature,

said chamber, said channel being divided longitudinally into two parts one supplying hot and the other cold air, a damper arranged in a transverse position in said channel so as to be capable of shutting oif either the hot or the cold air stream or admitting both in various proportions, an expansible liquid-receptacle built into the wall of the carbureting chamber so as to assume a system of levers controlits temperature, ling the position of the damper and adapted to be acted upon by the receptacle for varying the proportions of hot and cold air as the receptacle expands and contracts, a wedge arranged between the receptacle and the lever system so as to allow of being adjusted for varying the initial position of the damper, an adjustable valve for regulating the admission of liquid to the float chamber to suit the nature of the fuel used, and connections between said valve and the wedge for varying the position of the damper simultaneously with the valve.

6. In a float-feed carbureter, a carbureting chamber, a channel admitting air to said chamber, said channel being divided longitudinally into two parts one supplying hot and the other cold air, a damper arranged in a transverse position in said channel so as to be capable of shutting off either the hot or the cold air stream or admitting both in various proportions,.an expansible liquidreceptacle built into the wall of the carbureting chamber so as to assume its tema system of levers controlling the position of the damper and adapted to be acted upon by the receptacle for varying the proportions of hot and cold air as the receptacle expands and contracts, a wedge arranged between the receptacle and the lever system so as to allow of being adjusted for varying the initial position of the damper, a vertically adjustable valve for regulating the admission of the liquid to the float chamber to suit the nature of the fuel, a sleeve controlling the position of said valve and adapted to be rotated for its adjustment, and a flexible element connecting said sleeve with the wedge so that the latter is adjusted and the initial position of the damper varied simultaneously with the adjustment of the valve.

- OTTO MEISSNER. Witnesses:

FRI'I'IZ SCHUTZ, J AMES L. A. BUBRELL. 

